A285026 Number of n X 4 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 one less than the number of 0's adjacent to some 1.

2, 26, 442, 6460, 96458, 1449814, 22043878, 336883696, 5171750894, 79634735346, 1229304353554, 19015329654036, 294656614022300, 4573021347213134, 71071712948803680, 1105968089007186270, 17230453143587374712

Offset

1,1

Comments

Column 4 of A285030.

Links

R. H. Hardin, Table of n, a(n) for n = 1..207

Example

Some solutions for n=4
..0..0..0..1. .0..0..1..1. .0..0..1..0. .1..1..0..0. .1..1..1..0
..0..0..1..1. .1..1..0..1. .1..1..0..1. .0..1..0..0. .0..0..1..1
..0..0..1..0. .1..0..0..0. .0..1..1..0. .0..0..1..0. .0..0..0..0
..0..1..0..0. .0..0..0..0. .0..1..0..0. .1..1..0..1. .0..0..0..0

Crossrefs

Cf. A285030.

Sequence in context: A359924 A245999 A355725 * A137100 A228411 A364827

Adjacent sequences: A285023 A285024 A285025 * A285027 A285028 A285029

Keyword

nonn

Author

R. H. Hardin, Apr 08 2017

Status

approved